Re: [PATCH RESEND] btrfs: use the super_block as holder when mounting file systems

[Christian Brauner <brauner@kernel.org>]

On Thu, Sep 21, 2023 at 02:19:45PM +0200, Jan Kara wrote:
> From: Christoph Hellwig <hch@lst.de>
> 
> The file system type is not a very useful holder as it doesn't allow us
> to go back to the actual file system instance.  Pass the super_block
> instead which is useful when passed back to the file system driver.
> 
> This matches what is done for all other block device based file systems and it
> also fixes an issue that block device freezing (as used e.g. by LVM when
> performing device snapshots) starts working for btrfs.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> Acked-by: Christian Brauner <brauner@kernel.org>
> Reviewed-by: Josef Bacik <josef@toxicpanda.com>
> Message-Id: <20230811100828.1897174-7-hch@lst.de>
> Signed-off-by: Jan Kara <jack@suse.cz>
> ---
>  fs/btrfs/super.c | 7 ++-----
>  1 file changed, 2 insertions(+), 5 deletions(-)
> 
> Hello,
> 
> I'm resending this btrfs fix. Can you please merge it David? It's the only bit
> remaining from the original Christoph's block device opening patches and is
> blocking me in pushing out the opening of block devices using bdev_handle.
> Thanks!

Thanks for resending.

Next time we will ensure that a vfs triggered conversion must go through
a vfs tree as this half converted state with forgotten patches is not
something that we should repeat.

Christian